Lanthanum oxide modified aluminum oxide material as well as preparation method and application thereof

The invention discloses a lanthanum oxide modified aluminum oxide material as well as a preparation method and application thereof. The method comprises the following steps: adding aluminum oxide into a lanthanum salt solution for dipping, and drying and roasting after dipping to obtain the lanthanum oxide modified aluminum oxide material. The material takes aluminum oxide as a carrier, and a series of lanthanum oxide active components are loaded by utilizing a surface single-layer dispersion technology. The formed composite material is applied to treatment of phosphorus in wastewater. The raw materials are low in price, the preparation process is simple, energy consumption is low, pollution waste is not generated, and environment friendliness is achieved. The prepared lanthanum oxide modified aluminum oxide material has large specific surface area and pore volume, the surface can provide more positive charges to bond with phosphate radicals, and the lanthanum oxide modified aluminum oxide ...

Heavy oil catalytic cracking catalyst and preparation method thereof

The invention discloses a preparation method of a catalytic cracking catalyst used in a petroleum refining process and belongs to the technical field of preparation of catalysts. The method comprises the following steps: uniformly pulping and mixing a molecular sieve, pseudo-boehmite, clay and deionized water; adding alumina sol or not to prepare catalyst slurry; then performing spray drying, and roasting the catalyst slurry for 2-4h at the temperature of 300-600 DEG C; performing exchange washing through an ammonium sulfate and ammonium dihydrogen phosphate solution with the temperature of 40-99 DEG C and the mass concentration of 5-20 percent, wherein ammonium sulfate and ammonium dihydrogen phosphate account for 1-10 mass percent of a roasted product; drying the solution into an oven at the temperature of 50-150 DEG C to obtain the catalyst. According to the method, the solid content of the catalyst slurry is controlled by viscosity, the mesopore volume is increased, increase of the ...

Recycling technology of mother solution obtained by preparing layered composition metal hydroxide by coprecipitation method

The invention relates to a mother solution recycling technology for preparing a layered composition metal hydroxide by a coprecipitation method, belonging to the technical field of mother solution recycling technology in chemical production. The recycling technology comprises the following steps: separating seriflux of the layered composition metal hydroxide prepared by the coprecipitation method to obtain mother solution, and directly preparing a mixed alkali solution by using a part of the mother solution which is not processed in any way; taking another part of the mother solution, regulating a pH value to neutrality by using an acid with the same acid radical with a side product of sodium salt, and adding a salt-mixture material for dissolution; continuously coprecipiting the two parts of the mother solution which are prepared again to prepare LDHs and obtain the mother solution; repeating the step till side product salt in the mother solution reaches or approaches to a saturated state ...

Rectangular-morphology ZSM-5 molecular sieve and preparation method thereof

The invention relates to a rectangular-morphology ZSM-5 molecular sieve and a preparation method thereof. The preparation method utilizes sodium silicate as a silicon source, luminum nitrate, aluminum sulfate, sodium metaaluminate or aluminate as an aluminum source and tetrapropylammonium ions as templates. The preparation method comprises the following steps of stirring sodium silicate, the templates and a part of water at a temperature of 20-60 DEG C to obtain a uniform solution A, dissolving the aluminum source in the rest of water to obtain a solution B, dropwisely adding the solution B into the solution A with stirring, stirring the mixed solution at a room temperature to obtain a transparent and clear solution, transferring the transparent and clear solution into a stainless steel crystallization reactor, carrying out hydro-thermal synthesis at a temperature of 120-200 DEG C, and carrying out separation, drying and calcination, wherein a mole ratio of SiO2: Na2O: TPA<+>: water: Al2O3 ...

Process for preparing cracking catalyst for hydrocarbons containing molecular sieves

一种催化裂化催化剂的制备方法

... 本发明提供一种烃类裂化催化剂的制备方法，包括将分子筛浆液、拟薄水铝石、粘土以及无机酸打浆混合均匀，加入或不加入铝溶胶，制成催化剂浆液，然后喷雾干燥；其特征在于使拟薄水铝石胶溶所加入的无机酸的量以催化剂浆液粘度为控制指标。本发明提供的方法与现有技术的方法相比，可以避免因为拟薄水铝石耗酸量的波动引起的催化剂强度和孔体积等的波动。 ...

Preparation method of silicon-containing boehmite with large specific surface area and large pore volume

The invention discloses a preparation method of silicon-containing boehmite with large specific surface area and large pore volume. The method comprises the following steps: with sodium metaaluminate, aluminum sulfate and water glass as initial raw materials, simultaneously dripping the sodium metaaluminate, the aluminum sulfate and the water glass to prepare an intermediate product-aluminum hydrate for preparing and forming boehmite; carrying out hydro-thermal treatment on the obtained intermediate product; and finally cooling, washing and drying to obtain the silicon-containing boehmite. According to the silicon-containing boehmite prepared by the method, the silicon oxidecontent is 1-20wt%; the specific surface area is 600-850m<2>/g; and the pore volume is 1.7-2.4cm<3>/g. The method is simple in process, environment-friendly and easy to industrialize.

Catalytic cracking catalyst and its preparation

Cecropin and its generation bacterial strain and use

The invention provides a CP7 strain that can produce new antibacterial polypeptides that have strong antibacterial effect to gram-positive bacteria and are small peptides with 23 amino acid residues by the determination and whose amino acid sequence is: LLLAQPTAAVRGRCQVQRYLLA A. The invention also provides the application of the new antibacterial polypeptide in the preparation of the anti gram-positive bacteria drug.

Synthetic method of nano pure silicone beta-zeolite

A synthetic method for nano pure silicon beta zeolite comprises the steps: (1) according to the mole ratio of organic silicate ester (calculated in SiO2) to hydrolytic agent to water being 1.0:(0.001-0.080):(2.0-15.0), the hydrolytic agent and the organic silicate ester are added into the water and fully stirred, and under the conditions of 3 to 14 of PH value, -20 DEG C to 100 DEG C of temperature, 0.3 to 48 hours of aging, silicone gel is obtained; the silicone gel is dried and ground into silica gel particles; the hydrolytic agent is organic amines, organic acid or inorganic acid; (2) the mole ratio of silica gel particles (calculated in SiO2) obtained in step (1), a template agent (calculated in TEA<+>) and the water are evenly mixed according to the mole ratio of SiO2 to the templateagent to the water being 1:(0.1-1.0):(1.0-8.0), and then at the temperature of 100 to 190 DEG C, the obtained material is crystallized for 1 to 7 days; the nano pure silicon beta zeolite is obtained by ...

Fuel oil adsorption-desulfurization sorbent and preparation method thereof

The invention relates to a fuel oil adsorption-desulfurization sorbent which contains metal ions and Y-type molecular sieves and is characterized in that grains of the Y-type molecular sieves are lessthan 100 nm. The fuel oil adsorption-desulfurization sorbent is prepared in such a way that alumino silica gel of NaY molecular sieves are firstly prepared by the conventional method and then are concentrated and crystallized to obtain nanometer NaY molecular sieves, and then the molecular sieves and the metal ions are processed by ion exchange. The sorbent is used for the adsorption and the desulfurization of fuel oil containing polycyclic aromatic hydrocarbon and has large adsorption-desulfurization capability.

Silicon-phosphorus modified aluminum oxide and application thereof in adsorption and regeneration of anionic dye

The invention discloses silicon-phosphorus modified aluminum oxide and application thereof to adsorption and regeneration of anionic dye. The method comprises the following steps: dropwise adding water glass and a compound containing phosphate radicals into a mixed solution of an aluminum sulfate solution and a sodium metaaluminate solution, and crystallizing to obtain slurry; filtering, washing and drying the slurry to obtain silicon-phosphorus modified boehmite; and roasting the silicon-phosphorus modified boehmite at the temperature of 600-1000 DEG C for 1-4 hours to obtain the silicon-phosphorus modified aluminum oxide. The prepared silicon-phosphorus modified aluminum oxide has a large specific surface area and a large pore volume, and has an excellent adsorption effect on anionic dyes, especially Congo red and methyl blue. In addition, by means of the high thermal stability, the adsorbent is regenerated at high temperature, and after regeneration is conducted for 6 times, the adsorption ...

Catalytic cracking catalyst and its preparation

The invention relates to a preparation method of catalytic cracking catalyst, which comprises a step of mixing a matrix, a molecular sieve with water for beating. The invention is characterized in that the matrix includes at least one component having a fibrous structure and taking the weight of the solid in the slurry as reference, the content of the matrix in the slurry is 40 to 95 percent by weight, and the content of the molecular sieve is 5 to 60 percent by weight, wherein, the content of the component having a fibrous structure is 1 to 50 percent by weight. The catalytic prepared by themethod has less surface crack, high strength and strong anti-Ni pollution capability.

Process for preparing catalyst to remove nitrogen oxides and carbon monooxide from fume

Process for preparing catalystic cracking catalyst

This invention relates to prepn. of catalystic cracking catalyst. The process includes making catalyst slurry by mixing evenly molecular sieve slurry, aluminium collosol, quasi aluminium stone, clay and imorganic acid, then it is spray dried. The characteristic is to add molecular sieve slurry and/or aluminium collosol before clay and inorganic acid, acid inorganic acid after aluminium collosol. And before spray drying, alkali metal silicate is added into catalyst slurry. Compared with prior art the invention method has advantages: increasing prodn. efficiency, reducing energy consumption andcost.

Process for preparing cracking catalyst of petroleum hydrocarbons

A process for preparing cracking catalyst of petroleum hydrocarbons features that molecular sieve and/or aluminium sol are added before clay and inorganic acid, and the inorganic acid is added after aluminium sol and pseudo-boehmite. The grout of said catalyst contains a dethickening agent (0.1-2 wt.%), which may be ammonium phosphate, diammonium hydrogen phosphate, or ammonium bihydrogen phosphate, or their mixture. Its advantages are high solid content in catalyst grout before spray drying, short colloid-forming time, high productivity and low energy consumption and production cost.

Recycling technology of mother solution obtained by preparing layered composition metal hydroxide by coprecipitation method

The invention relates to a mother solution recycling technology for preparing a layered composition metal hydroxide by a coprecipitation method, belonging to the technical field of mother solution recycling technology in chemical production. The recycling technology comprises the following steps: separating seriflux of the layered composition metal hydroxide prepared by the coprecipitation methodto obtain mother solution, and directly preparing a mixed alkali solution by using a part of the mother solution which is not processed in any way; taking another part of the mother solution, regulating a pH value to neutrality by using an acid with the same acid radical with a side product of sodium salt, and adding a salt-mixture material for dissolution; continuously coprecipiting the two parts of the mother solution which are prepared again to prepare LDHs and obtain the mother solution; repeating the step till side product salt in the mother solution reaches or approaches to a saturated state ...

Preparation method of aluminum-enriched beta zeolite

The invention discloses a making method of allitic beta-zeolite, which comprises the following steps: making silica-alumina gel through silicon source and aluminium source under hydrolytic reagent; aging at 20-220 deg. c; roasting at 300-1400 deg. c; grinding the gel into silica-alumina source; adding the solution with ammonium tetraethyl cation, ammonium ion, fluorine ion and water; crystallizing; recycling the crystallized product as zeolite.

Method for synthesis of beta-zeolite

A synthetic method of beta-zeolite comprises the step of mixing and crystallizing alumino silica gel particles, a tetraethylammonium ion template agent, fluoride and water for 1-5 days at the temperature of 100-190 DEG C. Amounts of components in the mixture are that: the mol ratio of TEA<+> to SiO2 is 0.05-0.5, the mol ratio of TEA<+> to F<-> is 1-2, and the mol ratio of H2O to SiO2 is 2-10. Themethod can be used for synthesizing nano beta-zeolite with the ratio of silicon to aluminium ratio being not less than 300.

Process for preparing catalyst for catalytic cracking

Synthetic method of nano pure silicone beta-zeolite

A synthetic method for nano pure silicon beta zeolite comprises the steps: (1) according to the mole ratio of organic silicate ester (calculated in SiO2) to hydrolytic agent to water being 1.0:(0.001-0.080):(2.0-15.0), the hydrolytic agent and the organic silicate ester are added into the water and fully stirred, and under the conditions of 3 to 14 of PH value, -20 DEG C to 100 DEG C of temperature, 0.3 to 48 hours of aging, silicone gel is obtained; the silicone gel is dried and ground into silica gel particles; the hydrolytic agent is organic amines, organic acid or inorganic acid; (2) the mole ratio of silica gel particles (calculated in SiO2) obtained in step (1), a template agent (calculated in TEA<+>) and the water are evenly mixed according to the mole ratio of SiO2 to the template agent to the water being 1:(0.1-1.0):(1.0-8.0), and then at the temperature of 100 to 190 DEG C, the obtained material is crystallized for 1 to 7 days; the nano pure silicon beta zeolite is obtained by ...

Spherical ZSM-5 zeolite molecular sieve and its preparation method and use

The invention relates to a spherical ZSM-5 zeolite molecular sieve and its preparation method and use. The spherical ZSM-5 zeolite molecular sieve is synthesized from a silicon source or/and an aluminum source, a template and water as raw materials, and potassium fluoride or potassium chloride as an additive under the hydro-thermal conditions. The silicon source or/and the aluminum source, the template and water as raw materials, and potassium fluoride or potassium chloride as the additive are mixed according to a mole ratio of SiO2: Al2O3, TPA<+>: K: water of 1: 0-0.05: 0.05-0.8: 0.5-3: 30 to form a uniform mixture, the mixture is aged at a room temperature, the aged mixture is transferred into a stainless steel crystallization reactor and is subjected to crystallization at a temperature of 120-200 DEG C for 1-7 days, and the crystallized solid product is calcined. The spherical ZSM-5 zeolite molecular sieve having particle diameter of 20-40 microns can directly undergo a catalytic cracking ...

Preparation method of catalytic cracking fuel gas sulfur transfer additive active component

The invention discloses a catalytic cracking fuel gas sulfur transfer additive active component belonging to the technical field of flue gas desulfurization in oil refining industry. The preparation method of the catalytic cracking fuel gas sulfur transfer additive active component comprises the following steps of: preparing a cerium-loaded magnesia-alumina houghite precursor by adopting a calcine-recovering method; and then, obtaining the catalytic cracking fuel gas sulfur transfer additive active component by high-temperature calcinations. The catalytic cracking fuel gas sulfur transfer additive active component is applied to reducing the discharge of SOx pollutants of regeneration flue gas in a catalytic cracking process. The prepared catalytic cracking fuel gas sulfur transfer additive active component can be reduced at lower temperature after oxidative adsorption SOx even without introducing transition metal elements of V, Fe, Co, Cr, Cu, and the like, thereby releasing H2S to achieve ...

Method for preparing magnesium hydroxide from brucite ore

The invention provides a method for preparing magnesium hydroxide from brucite ore, which comprises the following steps of: mixing the brucite ore and water in a weight ratio of 1-60:100, and pre-breaking the obtained mixture; and stirring the pre-broken product at the temperature of between 100 and 400 DEG C and under the pressure of between 0.1 and 30MPa for 0.5 to 240 hours. The magnesium hydroxide prepared by the method has high purity, small and uniform grains, and is suitable to be used as a flame retardant of organic polymer materials. Besides, only the brucite ore is used in the reaction process, other chemical raw materials are not used in the method, so the reaction product can be directly dried to form the pure product; therefore, the water resource used for cleaning is greatly saved, the environment is protected, and the method is a clean method for preparing superfine magnesium hydroxide.

Fabricated modular outer-wrapping column base and construction method thereof

The invention relates to the technical field of building structure engineering, and provides a fabricated modular outer wrapping column foot and a construction method thereof.The fabricated modular outer wrapping column foot comprises a structural column, a concrete outer wrapping module, a column top stiffening rib, a main rib and a reserved anchor bolt, and the main rib and the reserved anchor bolt are pre-buried in a foundation; a bottom plate is welded to the bottom of the structural column and used for being fixedly connected with a foundation through the reserved anchor bolts. The concrete wrapping module is used for being arranged outside a structural column in a sleeving mode, a plurality of steel bar hole channels are reserved, and the steel bar hole channels are used for allowing the main reinforcements to pass through during splicing; a first mounting groove is formed in the top surface of the concrete top module and is used for additionally mounting the column top stiffening ...

Catalytic cracking sulfur-reducing auxiliary agent and preparation method thereof, and method for reducing sulfur content in catalytic cracking gasoline

The invention discloses a preparation method for a catalytic cracking sulfur-reducing auxiliary agent, a catalytic cracking sulfur-reducing auxiliary agent prepared by the preparation method, and a method for reducing sulfur content in catalytic cracking gasoline by using the catalytic cracking sulfur-reducing auxiliary agent. With the provided catalytic cracking sulfur-reducing auxiliary agent, the sulfur content of the gasoline can be reduced; meanwhile, yield of the catalytic cracking gasoline is increased.

Synthetic method of nano aluminum-rich beta-zeolite

A method for synthesizing nano aluminum-rich beta-zeolite comprises the steps as follows: (1) an alumino silica gel which is formed by mixing an aluminum source and acid is evenly mixed with aluminum source particles, dried and crushed into alumino silica gel particles, wherein, the mol ratio of the aluminum source to the silicon source is 0.05-0.2; and (2) a template agent is added to the alumino silica gel particles obtained in the step (1) and evenly mixed to produce a reaction mixture which is crystallized at the temperature of 80-190 DEG C for 1-6 days, therefore a product is obtained through recovery. The mol ratios of the feeding ingredients of the reaction mixture are as follows: the mol ratio of the template agent to the silicon source equals 0.1-1.0, and that of water to the silicon source equals 2-12. The template agent is a mixture of a tetraethylammonium compound and a fluoride, or tetraethylammonium fluoride dihydrate. The method provided by the invention is characterized ...

Steel-concrete combined wrapping column base and construction method thereof

The invention relates to the technical field of building structure engineering, and provides a steel-concrete combined wrapping column base and a construction method thereof.The steel-concrete combined wrapping column base comprises a concrete wrapping prefabricated part, a column base top stiffening rib, a steel column used for being fixed to a foundation and main reinforcements pre-buried in the foundation; a through hole allowing the steel column to pass through is formed in the middle of the concrete wrapping prefabricated part, and steel bar hole channels allowing the main bars to pass through are reserved in the periphery of the concrete wrapping prefabricated part; a reinforcement cage is arranged in the concrete wrapping prefabricated part, and hoop plates are arranged at the top and the bottom of the reinforcement cage. The column foot top stiffening rib is used for being arranged at the top of the concrete wrapping prefabricated part and is composed of a stiffening rib bottom ...

Synthetic method of Ti-beta molecular sieve

A synthetic method of TI-beta zeolite comprises the steps as follows: (1) silicate ester, titanate ester and butanol are evenly mixed according to the mol ratio that SiO2: TiO2: alcohol equals 1: (0.01-0.05): (4.0-15.0), and then NaOH solution is added for reaction at the room temperature of 120 DEG C, and kanemite is obtained by roasting; (2) the kanemite (counted based on SiO2), a template agent and water are evenly mixed according to the mol ratio that the SiO2: the template agent: the water equals 1: (0.1-1.0): (2.0-8.0) at the temperature of 120-170 DEG C, and crystallized for 2-15 days to obtain raw powder of a titanium silicalite molecular sieve with BEA skeleton structure; (3) the raw powder of the titanium silicalite molecular sieve obtained in the step (2) is washed by acid; and(4) the product washed by acid is roasted to obtain a Ti-beta molecular sieve product. The Ti-beta molecular sieve synthesized by the method in the invention contains little non-skeleton Ti, containsno ...

Efficient phosphorus removal adsorbent and preparation method thereof

The invention discloses an efficient phosphorus removal adsorbent and a preparation method thereof. The method comprises the following steps: roasting boehmite at 500-700 DEG C for 1-10 hours to obtain an activated aluminum oxide carrier, and then dropwise adding a ferric chloride solution for dipping, so that ferric chloride is uniformly dispersed in pores of activated aluminum oxide; and finally, heating and hydrolyzing to convert the ferric chloride confined in the pore channel of the aluminum oxide into amorphous iron oxyhydroxide in situ, thereby obtaining the efficient phosphorus removal adsorbent. The preparation method of the phosphorus removal adsorbent is simple, raw materials are cheap and easy to obtain, and the phosphorus removal adsorbent is environment-friendly and easy to industrialize. The phosphorus removal adsorbent prepared by the invention is used for removing phosphate in water, and is high in adsorption speed and adsorption capacity. 0.10 g of the adsorbent is used ...

Preparation method of macroporous large-specific-surface-area mesoporous carbon material and application of macroporous large-specific-surface-area mesoporous carbon material in removal of dye in water

The invention discloses a preparation method of a macroporous large-specific-surface-area mesoporous carbon material and application of the macroporous large-specific-surface-area mesoporous carbon material in the aspect of removing dye in water. The method comprises the following steps: preparing a mesoporous carbon/alumina composite material by adopting a hard template method and taking alumina as a hard template, phenolic resin as a carbon source and KOH as an activating agent, removing the alumina template by using an HF solution to prepare a mesoporous carbon material, and adsorbing crystal violet dye molecules in water by using the mesoporous carbon material as an adsorbent. The raw materials used in the method are low in price, pollution waste is not generated, and the method is environment-friendly. The prepared mesoporous carbon is high in specific surface area and large in most probable aperture, and can be used for efficiently removing dyes in water. When the adsorbent is applied ...

Flue gas purifying catalyst

A catalyst for simultaneously removing nitrogen oxide, sulfur oxide and carbon monoxide from flue gas is formed from complex oxide of magnesium, aluminium,at least one transition metal element and atleast one rare-earth metal element. Said catalyst is made up by using mixture of laminate materials which possess hydrotalcite structure and contain Mg, Al and transition metal element and rare earthhydrated oxide through the roasting process. Said catlyst can simultanously remove nitrogen oxide, sulfur oxide and carbon monoxide from flue gas, and possesses excellent water thermal stability.

Multi-atmosphere dynamic thermogravimetric-differential thermal analyzer and application thereof in sulfur transfer performance simulation and evaluation of flue gas

The invention discloses a multi-atmosphere dynamic thermogravimetric-differential thermal analyzer which belongs to the field of petroleum refining industry and researches application thereof in sulfur transfer performance simulation and evaluation of flue gas. The analyzer comprises a protection gas circuit, a multigroup reaction gas circuit, a purging gas circuit, a switching valve, a test reactor, a drain port, a tail gas absorption device and an electrothermal furnace. The analyzer can blend and provide different required multicomponent mixed gas through one or a plurality of groups of gas regulating and mixing systems, switch the atmospheres in the test reactor according to requirements, simulate reaction atmospheres with complicated changes, realize dynamic in-situ testing, more particularly simulate a sulfur dioxide atmosphere and a hydrogen atmosphere (or a hydrocarbon atmosphere) under the micro positive pressure and carry out safe switching between the sulfur dioxide atmosphere ...

Prepn of catalytic cracking catalyst

The preparation method of hydrocarbon cracking catalyst includes the following steps: using molecualr sieve slurry, pseudothin empholite, clay and inorganic acid as raw material, pulping, uniformly mixing, adding or no adding aluminium sol to obtain catalyst slurry, then spraying and drying to obtain the invented catalyst. It is characterized by that it uses the catalyst slurry viscosity as indexfor controlling addition quantity of inorganic acid in pseudothin empholite sol, and as compared with existent technique it can prevent wave motion of catalyst strength and pore volume resulted from wave motion of acid consumption of pseudothin empholite.

Preparation for nanometer allitic beta-zeolite

The invention discloses a method for preparing Al-rich Beta zeolite. The method is characterized in that a silicon source which is easy to be dissolved in alcohols and a hydrolytic reagent are mixed to be gel which is then treated with aging and drying to obtain silica gel; the silica gel is then evenly mixed with hydrated alumina and acid to obtain mixed silicon-aluminum gel; after being aged, the prepared mixed silicon-aluminum gel is evenly mixed with tetraethyl ammonium cation compound, ionic compound containing F<-> and water to carry out crystallization and recover products of the crystallization.

Process for preparing cracking catalyst for hydrocarbons containing molecular sieves

A method for preparation of olefin-cracking molecular sieve catalyst contains the following steps: mixing equably aluminium sol, hydrated alumina, clay, acid, molecular sieve with water to prepare a serous fluid of a solid content of 25-45 weight percent, and then drying it. Said hydrated alumina contains a modified hydrated alumina, which is prepared by roasting hydrated alumina in the temperature of 150-400 Deg. C at least 10 minutes, and provides alumina of at least 5 weigh percent compared with total amount provided by hydrated alumina. Said acid is added after aluminium sol and hydrated alumina. Cracking catalyst prepared in this way has big hole diameter and hole bulk, and thus has high light oil selectivity and low coke selectivity.

Preparation of petroleum cracking catalyst

The preparation includes beating the mixture of alumina sol, pseudo-boehmite, clay inorganic acid and molecular sieve into homogeneous catalyst slurry with solid content of 25-45 wt% and spray drying. It feature the addition of alumina sol before clay and inorganic acid and the addition of molecular sieve slurry after inorganic acid. It is preferably to add inorganic acid after alumina sol and pseudo-boehmite with the addition of other material being not limited. Compared with prior process,the preparation process of the present invention has raised solid content in catalyst slurry before spray drying, shortened gel-formation time and thus raised catalyst producing efficiency and lowered energy consumption and production cost.

Fuel oil adsorption-desulfurization sorbent and preparation method thereof

The invention relates to a fuel oil adsorption-desulfurization sorbent which contains metal ions and Y-type molecular sieves and is characterized in that grains of the Y-type molecular sieves are less than 100 nm. The fuel oil adsorption-desulfurization sorbent is prepared in such a way that alumino silica gel of NaY molecular sieves are firstly prepared by the conventional method and then are concentrated and crystallized to obtain nanometer NaY molecular sieves, and then the molecular sieves and the metal ions are processed by ion exchange. The sorbent is used for the adsorption and the desulfurization of fuel oil containing polycyclic aromatic hydrocarbon and has large adsorption-desulfurization capability.

Method for economically preparing microwave atoms for layered complex metal hydroxide

The invention discloses a method for economically preparing microwave atoms for layered complex metal hydroxide, belonging to the filed of the technology for preparing the inorganic non-metallic functional material. The layered complex metal hydroxide is prepared from the raw materials of metal hydroxide, ammonium salt and ammonia water through the economic reaction of atoms in a microwave reactor. Because the ammonium salt and the ammonia water are used for the economic reaction of the atoms, the economic reaction temperature is reduced, and the economic reaction condition is made to be milder and to be easier to control. The ammonia in the ammonium salt and the ammonia water can be post-processed for recovering, and all the raw materials are made to react to generate the target product of reaction. The atoms are 100 percent economical, and the economic reaction of the atoms is typical. No by-product of reaction is generated in the process for preparing the microwave atoms for the layered ...

Two colorful ball bent handle breast -stroke cars

The utility model provides a two colorful ball bent handle breast -stroke cars, including the bent handle pole, the colorful ball, fixed cover, the foot bar, shaft and rotor, and brake hand and inner tube on the bent handle pole, and brake line on hand, the inner tube links to each other with the straight -bar, and the hasp on the straight -bar, pipe box and fixed cover, and the hyaline tube between two pipe boxes, and the color lamp strip in the hyaline tube, and and the siamesed rotor of fixed cover, and the wheel cap on the rotor, shaft and foot bar, and the brake sole that is connected with the wheel cap, and footboard and wheel carrier on the foot bar, and the transparency cover on the footboard, and color lamp strip and power object in the transparency cover, and the wheel on the wheel carrier, the rotor constitute by shaft, colorful ball, bull stick, bevel gear and bearing, epaxial bevel gear and the wheel of being equipped with of wheel, the bull stick be equipped with colorful ...

Process for preparing catalyst for catalytic cracking

A catalyst for catalystic cracking is prepared from molecular sieve milk, aluminium sol, diasporite, clay and inorganic acid through mixing, and spray drying. Said process features its order of adding raw materials, that is, molecular sieve milk-aluminium sol-diasporite-inorganic acid other raw materials are not limited. Its advantages are high solid content of catalyst grout before spray drying,short colloid forming time, high productivity, and low cost and energy consumption.

Method for economically preparing microwave atoms for layered complex metal hydroxide

The invention discloses a method for economically preparing microwave atoms for layered complex metal hydroxide, belonging to the filed of the technology for preparing the inorganic non-metallic functional material. The layered complex metal hydroxide is prepared from the raw materials of metal hydroxide, ammonium salt and ammonia water through the economic reaction of atoms in a microwave reactor. Because the ammonium salt and the ammonia water are used for the economic reaction of the atoms, the economic reaction temperature is reduced, and the economic reaction condition is made to be milder and to be easier to control. The ammonia in the ammonium salt and the ammonia water can be post-processed for recovering, and all the raw materials are made to react to generate the target product of reaction. The atoms are 100 percent economical, and the economic reaction of the atoms is typical. No by-product of reaction is generated in the process for preparing the microwave atoms for the layered ...

Clean method for preparing borate intercalation hydrotalcite-like compound

The invention discloses a clean method for preparing a borate intercalation hydrotalcite-like compound. By using the adjustability of interlaminar anions of the hydrotalcite-like compound and based on atom economic reaction, the borate intercalation hydrotalcite-like compound with the interlaminar anions B(OH)4<-> and/or B3O3(OH)4<-> is generated by inserting borate ions into interlamination of the hydrotalcite-like compound. All atoms in raw materials enter in the reaction to generate the target product in the preparation process without byproducts; and a purified product can be obtained by directly filtering and drying the product without washing, so washing water is greatly saved and the environment is protected.

Two colorful ball breast -stroke cars of four -wheel

The utility model provides a two colorful ball breast -stroke cars of four -wheel, includes bent handle pole, colorful ball, fixes the cover, steps on axle, foot bar, shaft and rotating device, and brake hand and inner tube on the bent handle pole, and brake line on hand, reaches hasp and pipe box on the straight -bar, and the hyaline tube between two pipe boxes, and the color lamp strip in the hyaline tube, and the fixed cover of straight -bar lower part, and reach the brake sole that the two -wheeled was covered, and step on epaxial foot bar, and footboard and wheel carrier on the foot bar, and the wheel on the wheel carrier, rotating device by rotor, shaft, flexible axle, colorful ball, go up the bull stick, down bull stick, bevel gear, bearing, fixed frame and down the mount forms, be equipped with bull stick, bearing and flexible axle among the fixed frame, be equipped with bull stick, bearing, two flexible axles, action wheels in the lower mount and from driving wheels, flexible axle ...

Controllable preparation method of large-specific-area large-pore-volume boehmite

The invention discloses a controllable preparation method of large-specific-area large-pore-volume boehmite. The method comprises the following steps: preparing a medium product aluminum hydroxide of boehmite by using the titrimetry using aluminum sulfate and sodium metaaluminate as raw materials; performing hydro-thermal treatment on the obtained medium product; cooling; washing; and drying to obtain boehmite. According to the method, the specific area of the prepared large-specific-area large-pore-volume boehmite is gradually increased within the range of 400 to 800m<2>/g as the concentration of an aluminum sulfate solution increases, and the pore volume is gradually increased within the range of 1.4 to 2.4cm<3>/g. The method is green, simple and easy to be industrialized.

Method for modifying lamellar molecular sieve titanium intercalation

The invention discloses a method for modifying lamellar molecular sieve titanium intercalation and belongs to the technical field of molecular sieve modification. By adopting the method for modifying organic titanate oriented intercalation, the channel diameter of the obtained molecular sieve is obviously increased, the specific surface area and pore volume are obviously improved, the distribution of titanium atoms is controllable, the molecular sieve has good hydrophilia, high purity and good stability, is applicable to the industrial production of hydrocarbon oxidation and achieves good technical effects.

Method for applying GM (1,1) model to predict winter jujube planting area in Dongying

The invention relates to a prediction method, in particular to a method for applying a GM (1,1) model to predict the winter jujube planting area in Dongying. According to the method, aiming at the problems that the Dongying winter jujube plantation is high in planting management technique requirement, the winter jujube is not easy to store, and high risks exist in the development of the plantation industry, a grey prediction model applicable to the local winter jujube plating area is established, it is technically guaranteed that the winter jujube production can be planed and arranged timely, the operational guidance can be strengthened in proper time, and the risks in the development of the winter jujube industry are reduced. According to the technical scheme, the method comprises the following steps: 1 through an accumulation generating method, weakening the randomness and volatility of an initial time series, making the initial time series into a regular time series, fitting the generated ...

Atom economic preparation method for laminated composite metal hydroxide

The invention discloses an atom economic preparation method for laminated composite metal hydroxide, and belongs to the technical filed of the preparation of inorganic non-metal functional materials. In the method, the laminated composite metal hydroxide is prepared from metal hydroxide, ammonium salt and ammonia water serving as raw materials through atom economical reaction in a reactor. Due to the adoption of the ammonium salt and the ammonia water in the reaction process, the reaction temperature is reduced and the reaction condition is milder and is controlled easily; the ammonium in the ammonium salt and the ammonia water used in the reaction can be recycled in the post-treatment; the metal hydroxide and the corresponding ammonium salt with negative ion An- are used in the reaction, and other raw materials such as NaOH and the like are not used; and all the raw materials take part in the reaction to generate the target product and the atom economy is 100 percent, so the reaction belongs ...

Synthetic method of Ti-beta molecular sieve

A synthetic method of TI-beta zeolite comprises the steps as follows: (1) silicate ester, titanate ester and butanol are evenly mixed according to the mol ratio that SiO2: TiO2: alcohol equals 1: (0.01-0.05): (4.0-15.0), and then NaOH solution is added for reaction at the room temperature of 120 DEG C, and kanemite is obtained by roasting; (2) the kanemite (counted based on SiO2), a template agent and water are evenly mixed according to the mol ratio that the SiO2: the template agent: the water equals 1: (0.1-1.0): (2.0-8.0) at the temperature of 120-170 DEG C, and crystallized for 2-15 days to obtain raw powder of a titanium silicalite molecular sieve with BEA skeleton structure; (3) the raw powder of the titanium silicalite molecular sieve obtained in the step (2) is washed by acid; and (4) the product washed by acid is roasted to obtain a Ti-beta molecular sieve product. The Ti-beta molecular sieve synthesized by the method in the invention contains little non-skeleton Ti, contains no ...

Silicon modified aluminum oxide with high thermal stability and preparation method thereof

The invention discloses silicon-modified aluminum oxide with high thermal stability and a preparation method of the silicon-modified aluminum oxide. The method comprises the following steps: titrating and neutralizing an aluminum sulfate solution or an aluminum chloride solution and a sodium metaaluminate solution; then crystallizing to obtain slurry; adding a water glass solution into the slurry while stirring, filtering, washing and drying to obtain silicon modified boehmite; and roasting the silicon-modified boehmite to obtain the silicon-modified aluminum oxide. The preparation method is green and clean, the problems that the produced alumina is poor in thermal stability and small in specific surface area and pore volume are solved, particularly, the alumina has the specific surface area of 650-730 m < 2 >/g and the pore volume of 2.5-3.3 cm < 3 >/g after being roasted at 600 DEG C, and the alumina has the specific surface area of 350-500 m < 2 >/g and the pore volume of 2.2-2.8 cm ...

Method for preparing magnesium hydroxide from brucite ore

The invention provides a method for preparing magnesium hydroxide from brucite ore, which comprises the following steps of: mixing the brucite ore and water in a weight ratio of 1-60:100, and pre-breaking the obtained mixture; and stirring the pre-broken product at the temperature of between 100 and 400 DEG C and under the pressure of between 0.1 and 30MPa for 0.5 to 240 hours. The magnesium hydroxide prepared by the method has high purity, small and uniform grains, and is suitable to be used as a flame retardant of organic polymer materials. Besides, only the brucite ore is used in the reaction process, other chemical raw materials are not used in the method, so the reaction product can be directly dried to form the pure product; therefore, the water resource used for cleaning is greatlysaved, the environment is protected, and the method is a clean method for preparing superfine magnesium hydroxide.

Preparation method of nanometer laminated composite metal hydroxide

The invention relates to a preparation method of nanometer laminated composite metal hydroxide, which is characterized by comprising the following steps of: mixing nanometer M(OH)2 with nanometer N(OH)3 in a molar ratio of 2-4:1; and then reacting the mixture with acidic aqueous solution at 50 to 100 DEG C for 0.5 to 10 days under a stirring condition, wherein based on one part of the total weight of the M(OH)2 and the N(OH)3, the using amount of the acidic aqueous solution is 1 to 1,000 weight parts, the molar ratio of acid in the acidic aqueous solution to N in the N(OH)3 is (n-1):1 to (n+1):1, and n represents the number of hydrogen in the acid per molecule. The laminated composite metal hydroxide is prepared by using the method of the invention, various components in the raw materials are all reacted to generate a target product or hydrone, and no byproduct is generated in the process, so water resources are greatly saved and the environment is protected. In addition, the method can ...

Solid electrolytic capacitor with improved metal anode and manufacturing method thereof

The invention provides a solid electrolytic capacitor with an improved metal anode and a manufacturing method thereof. The solid electrolytic capacitor with the improved metal anode comprises a base material layer, a conductive macromolecule layer and an electrode layer, wherein the base material layer is provided with an anode part and a cathode part, the anode part is thinner than the cathode part, the cathode part is wrapped in the conductive macromolecule layer, and the conductive macromolecule layer is wrapped in the electrode layer. When the solid electrolytic capacitor with the improved metal anode is used for stack encapsulation molding, the welding success rate can be increased greatly.

Malicious traffic identification method and system based on deep learning

The invention discloses a malicious traffic identification method and system based on deep learning, and relates to the technical field of traffic identification. Comprising the following steps: selecting proper data samples to form a data set, and preprocessing the data set; establishing a preliminary malicious traffic identification model by using a convolutional neural network; performing parameter adjustment on the malicious traffic identification model by adopting a deep learning algorithm; and performing an accuracy test on the malicious traffic identification model after parameter adjustment by using the preprocessed data set to obtain a final malicious traffic identification model. According to the malicious traffic identification model, the problem of pain points of many traditional identification modes is solved through deep learning, the identification rate of encrypted traffic is greatly improved, and efficient and rapid malicious traffic identification is realized.

Scattering antenna optimal communication angle searching method based on reinforcement learning

The invention provides a scattering antenna optimal communication angle searching method based on reinforcement learning, and belongs to the technical field of scattering communication. According to the method, an antenna optimal communication angle search process is modeled into a Markov random process, and the search process is optimized by adopting a reinforcement learning method. The method comprises the following steps of: regularly obtaining a communication angle and single-carrier measurement signal receiving strength in the optimal communication angle search process of a scattering antenna; constructing a reinforcement learning model and training the model; storing a training result of the reinforcement learning model; and loading a training result to perform optimal communication angle search on a new scene. According to the method, the optimal communication angle can be approached at lower time cost, and the method has better adaptability.

一种催化裂化催化剂的制备方法

... 本发明提供一种裂化催化剂的制备方法，该方法包括将分子筛浆液、铝溶胶、拟薄水铝石、粘土以及无机酸打浆混合均匀制成催化剂浆液，然后喷雾干燥；其特征在于分子筛浆液和/或铝溶胶在粘土和无机酸之前加入，无机酸在铝溶胶之后加入，优选的是无机酸在铝溶胶和拟薄水铝石之后加入，其余物料的加入顺序没有特别的限制，并且在喷雾干燥前的所说催化剂浆液中加入一种碱金属硅酸盐。本发明提供的方法与现有技术的方法相比，可以大大提高喷雾干燥前催化剂浆液的固含量，缩短成胶时间，从而提高催化剂的生产效率，并降低能耗和生产成本，同时提高催化剂的活性和活性稳定性。 ...

Flue purifying catalytic conversion method

Method for preparing laminated composite metal hydroxide

The invention discloses a method for preparing a laminated composite metal hydroxide, comprising the following steps of: mixing M(OH)2 and N(OH)3 according to the molar ratio of 2-4:1; and subjecting the mixture and an acid water solution to a reaction for 0.1-10 days at 100-300DEG C under the stirring condition, wherein the consumption of the acid water solution is 1-1,000 parts by weight, on the basis of the total weight of M(OH)2 and N(OH)3 as 1 part by weight, the molar ratio of acid in the acid water solution to N in the N(OH)3 is (n-1):1 to (n+1):1 and n expresses the number of nitrogen in each molecule of acid. When the laminated composite metal hydroxide is prepared from the method, various components in raw materials participate in the reaction to generate a target product or water molecule, no side product is generated in the process, water resources are saved and the environment is protected. In addition, in the method, by using brucite and pseudo-boehmite with low price as raw ...

Method for synthesis of beta-zeolite

The present invention relates to a synthetic method of beta zeolite comprising the steps as follows: an aluminium sources selected from one or a plurality of pseudoboehmite, hydrated alumina, aluminum hydroxide, aluminium chloride hydrate and SB aluminium hydroxide is acidified by acid and mixed with silica gel, the silica gel is fully mixed with the aluminum source by ultrasonic waves, dried, ground, and mixed with a tetraethylammonium ion template agent, fluoride and water, and crystallized at the temperature of 100-190 DEG C for 1-4 days. The mol ratio of TEA<+> and SiO2 in the mixture is 0.05-0.5, the mol ratio of the TEA<+> and F<-> is 1-2, and the mol ratio of H2O and the SiO2 is 2-10. The method can be used for synthesizing nano beta zeolite with the ratio of silicon to aluminium being not less than 300.

Method for synthesis of beta-zeolite

A synthetic method of beta-zeolite comprises the step of mixing and crystallizing alumino silica gel particles, a tetraethylammonium ion template agent, fluoride and water for 1-5 days at the temperature of 100-190 DEG C. Amounts of components in the mixture are that: the mol ratio of TEA<+> to SiO2 is 0.05-0.5, the mol ratio of TEA<+> to F<-> is 1-2, and the mol ratio of H2O to SiO2 is 2-10. The method can be used for synthesizing nano beta-zeolite with the ratio of silicon to aluminium ratio being not less than 300.

Preparation for nanometer allitic beta-zeolite

The invention discloses a method for preparing Al-rich Beta zeolite. The method is characterized in that a silicon source which is easy to be dissolved in alcohols and a hydrolytic reagent are mixed to be gel which is then treated with aging and drying to obtain silica gel; the silica gel is then evenly mixed with hydrated alumina and acid to obtain mixed silicon-aluminum gel; after being aged, the prepared mixed silicon-aluminum gel is evenly mixed with tetraethyl ammonium cation compound, ionic compound containing F<-> and water to carry out crystallization and recover products of the crystallization.

Handlebody colorful ball tricycle breast -stroke car

The utility model provides a handlebody colorful ball tricycle breast -stroke car, including the handlebody, the colorful ball, fixed pipe, the foot bar, shaft and transmission, and the inner tube on the handlebody, the inner tube links to each other with the straight -bar, and the hasp on the straight -bar, the pipe box, fixed pipe and jaw, and the shaft and the wheel that link to each other with the jaw, and the hyaline tube between two pipe boxes, and the color lamp strip in the hyaline tube, and mount and connector on the fixed pipe, and the foot bar on the connector, and footboard and wheel carrier on the foot bar, and the transparency cover on the footboard, and color lamp strip and power object in the transparency cover, and the wheel on the wheel carrier, transmission constitute by mount, colorful ball, bull stick, flexible axle and reduction gear, epaxial reduction gear and the wheel of being equipped with of wheel, the colorful ball establish on fixed pipe, the mount in be equipped ...

Method for preparing laminated composite metal hydroxide

The invention discloses a method for preparing a laminated composite metal hydroxide, comprising the following steps of: mixing M(OH)2 and N(OH)3 according to the molar ratio of 2-4:1; and subjecting the mixture and an acid water solution to a reaction for 0.1-10 days at 100-300DEG C under the stirring condition, wherein the consumption of the acid water solution is 1-1,000 parts by weight, on the basis of the total weight of M(OH)2 and N(OH)3 as 1 part by weight, the molar ratio of acid in the acid water solution to N in the N(OH)3 is (n-1):1 to (n+1):1 and n expresses the number of nitrogenin each molecule of acid. When the laminated composite metal hydroxide is prepared from the method, various components in raw materials participate in the reaction to generate a target product or water molecule, no side product is generated in the process, water resources are saved and the environment is protected. In addition, in the method, by using brucite and pseudo-boehmite with low price asraw ...

Heavy oil catalytic cracking catalyst for enhancing diesel oil yield and preparation method of catalyst

The invention discloses a preparation method of a catalytic cracking catalyst used in petroleum processing, belongs to the technical field of catalyst preparation, and particularly relates to a heavy oil catalytic cracking catalyst for enhancing the diesel oil yield and a preparation method of the catalyst. The preparation method of the catalyst comprises the following steps: pulping and evenly mixing molecular sieves, pseudo-boehmite, clay, inorganic acid and deionized water and simultaneously adding or not adding aluminum sol to prepare catalyst pulp, performing spray drying, roasting, then performing exchange washing by ammonium sulfate and ammonium dihydrogen phosphate solutions, and finally drying to obtain the catalyst. By virtue of the method, the peptization degree of the pseudo-boehmite can be effectively controlled, so that the pore volume of the catalyst is prevented from being affected by the fluctuation of the content of acid of the pseudo-boehmite. Compared with the prior ...

Colorful ball swing car

The utility model provides a colorful ball swing car, includes the telescopic link, handle bar, colorful ball, fixed pipe, foot bar, shaft and transmission, and on the inner tube handle bar, brake hand and mount, and the hasp on the straight -bar, pipe box, fixed pipe and jaw, and the shaft and the wheel that link to each other with the jaw, and the color lamp strip in the hyaline tube, and the connecting box on the fixed pipe, and footboard and wheel carrier on the foot bar, and the transparency cover on the footboard, and interior color lamp strip and the power object of transparency cover reach braking vane and wheel on the wheel carrier, transmission constitute by mount, colorful ball, bull stick, flexible axle and reduction gear, epaxial reduction gear and the wheel of being equipped with of wheel, the reduction gear in be equipped with worm wheel and screw rod, the colorful ball establish on the handle bar, the mount in be equipped with gear wheel and pinion, one end of flexible axle ...

Preparation of petroleum cracking catalyst

Preparation method of aluminum-enriched beta zeolite

The invention discloses a making method of allitic beta-zeolite, which comprises the following steps: making silica-alumina gel through silicon source and aluminium source under hydrolytic reagent; aging at 20-220 deg. c; roasting at 300-1400 deg. c; grinding the gel into silica-alumina source; adding the solution with ammonium tetraethyl cation, ammonium ion, fluorine ion and water; crystallizing; recycling the crystallized product as zeolite.

One-dimensional morphology cobalt-aluminum hydrotalcite and its preparation method and electrochemical application

The invention relates to one-dimensional morphology cobalt-aluminum hydrotalcite and its preparation method and electrochemical application, and belongs to the field of preparation of inorganic nonmetal functional materials. Through solid-liquid ion exchange of a solid cobalt-containing precursor and aluminum-containing and carbonate ion-containing solutions and in-situ crystalline phase transformation, the one-dimensional morphology hydrotalcite-like compound is obtained. The preparation method improves material dispersion uniformity and reduces bulk density. The one-dimensional morphology cobalt-aluminum hydrotalcite is suitable for being used as an electric material in field of energy.

Method for synthesis of beta-zeolite

A synthetic method of beta zeolite comprises the steps as follows: an aluminium sources selected from one or a plurality of pseudoboehmite, hydrated alumina, aluminum hydroxide, aluminium chloride hydrate and SB aluminium hydroxide is acidified by acid and mixed with silica gel, the silica gel is fully mixed with the aluminum source by ultrasonic waves, dried, ground, and mixed with a tetraethylammonium ion template agent, fluoride and water, and crystallized at the temperature of 100-190 DEG C for 1-4 days. The mol ratio of TEA<+> and SiO2 in the mixture is 0.05-0.5, the mol ratio of the TEA<+> and F<-> is 1-2, and the mol ratio of H2O and the SiO2 is 2-10. The method can be used for synthesizing nano beta zeolite with the ratio of silicon to aluminium being not less than 300.

Preparation method for high-efficiency sulfur transfer agent active component in catalytic cracking flume

The invention discloses a preparation method for a high-efficiency sulfur transfer agent active component in catalytic cracking flume, which belongs to the technical filed of flume desulfurization in petroleum refining industries. The preparation method comprises the following steps of preparing a hydrotalcite-like precursor with a nucleation and crystallization isolating method, and baking at high temperature to obtain the sulfur transfer agent active component with CeO2 crystal particles in a high dispersing state in the catalytic cracking flume. The invention is used to reduce SOX pollutant exhaust in reproduced flume in the catalytic cracking process. The sulfur transfer agent active component in the catalytic cracking flume prepared by the invention has high SOX absorbing capacity and oxidization sulfur absorption rate and has strong heat stability and high-temperature baking resistant capability so as to keep the sulfur transfer performance.

Process for preparing ZSM-S moleclar sieve

Method for synthesizing aluminum-enriched beta zeolite

The invention discloses a synthesizing method of beta-zeolite, which comprises the following steps: using the solution with aluminium source or acid solution to impregnate silicon source; stirring unit solidifying; aging to dehydrate at 60-150 deg. c without disposed by ammonia; grinding; sintering at 600-1400 deg. c for 1-24h; obtaining the silica-alumina source; blending the ammonium tetraethylcation compound and hydrofluoric acid; evaporating water under normal pressure not less than 130 deg. c or in the vacuum; adding silica-alumina source into the condensed composite solution of ammonium hydroxide tetraethyl and hydrofluoric acid; proceeding hydrothermal crystallization for the obtained composition; recycling the crystallized product.

Preparation method for high-efficiency sulfur transfer agent active component in catalytic cracking flume

The invention discloses a preparation method for a high-efficiency sulfur transfer agent active component in catalytic cracking flume, which belongs to the technical filed of flume desulfurization in petroleum refining industries. The preparation method comprises the following steps of preparing a hydrotalcite-like precursor with a nucleation and crystallization isolating method, and baking at high temperature to obtain the sulfur transfer agent active component with CeO2 crystal particles in a high dispersing state in the catalytic cracking flume. The invention is used to reduce SOX pollutant exhaust in reproduced flume in the catalytic cracking process. The sulfur transfer agent active component in the catalytic cracking flume prepared by the invention has high SOX absorbing capacity and oxidization sulfur absorption rate and has strong heat stability and high-temperature baking resistant capability so as to keep the sulfur transfer performance.

Synthetic method of nano aluminum-rich beta-zeolite

A method for synthesizing nano aluminum-rich beta-zeolite comprises the steps as follows: (1) an alumino silica gel which is formed by mixing an aluminum source and acid is evenly mixed with aluminum source particles, dried and crushed into alumino silica gel particles, wherein, the mol ratio of the aluminum source to the silicon source is 0.05-0.2; and (2) a template agent is added to the alumino silica gel particles obtained in the step (1) and evenly mixed to produce a reaction mixture which is crystallized at the temperature of 80-190 DEG C for 1-6 days, therefore a product is obtained through recovery. The mol ratios of the feeding ingredients of the reaction mixture are as follows: the mol ratio of the template agent to the silicon source equals 0.1-1.0, and that of water to the silicon source equals 2-12. The template agent is a mixture of a tetraethylammonium compound and a fluoride, or tetraethylammonium fluoride dihydrate. The method provided by the invention is characterized ...

Main transformer cavity foundation construction method and main transformer cavity foundation

The invention discloses a main transformer cavity foundation construction method and a main transformer cavity foundation, belongs to the technical field of main transformer foundations, and provides a main transformer cavity foundation with a reusable inner film and a construction method. The main transformer cavity foundation with the reusable inner film comprises a bottom plate, a cavity type foundation and the reusable shrinkage inner film, the cavity type foundation is formed by cast-in-place on the bottom plate; a cavity inner film mounting hole is reserved in the top of the cavity type foundation, and the reusable shrinkage inner film enters the cavity type foundation through the cavity inner film mounting hole. After the retractable inner film capable of being repeatedly used is unfolded and placed at a set position, the unfolded retractable inner film capable of being repeatedly used is used for being jacked to the position of a bottom plate through external inflation.

Clean method for preparing borate intercalation hydrotalcite-like compound

The invention discloses a clean method for preparing a borate intercalation hydrotalcite-like compound. By using the adjustability of interlaminar anions of the hydrotalcite-like compound and based on atom economic reaction, the borate intercalation hydrotalcite-like compound with the interlaminar anions B(OH)4<-> and/or B3O3(OH)4<-> is generated by inserting borate ions into interlamination of the hydrotalcite-like compound. All atoms in raw materials enter in the reaction to generate the target product in the preparation process without byproducts; and a purified product can be obtained by directly filtering and drying the product without washing, so washing water is greatly saved and the environment is protected.

Process for preparing ZSM-5 molecular sieve

A process for prepring ZSM-5 molecular sieve includes such steps as liquid-phase ion exchange of Y-type molecular sieve to obtain FeY molecular sieve containing Fe2O3 (3-25 wt.%), proportionally mixing it with Si source, Al source, organic amine as template agent and uniformly mixing with water and regulating pH value to make the resultant have a general mot ratio of Na2O:Al2O3:SiO2:R:H2O=(0.04-0.12):(0.006-0.05):1:(0-0.40):(5-40), and then crystallizing the resultant mixture under hydrothermal condition. The ZSM-5 molecular sieve can be directly synthesized by hydrothermal method in Si-Al-Fesystem.

Process for preparing cracking catalyst of petroleum hydrocarbons

Cecropin and its generation bacterial strain and use

The invention provides a CP7 strain that can produce new antibacterial polypeptides that have strong antibacterial effect to gram-positive bacteria and are small peptides with 23 amino acid residues by the determination and whose amino acid sequence is: LLLAQPTAAVRGRCQVQRYLLA A. The invention also provides the application of the new antibacterial polypeptide in the preparation of the anti gram-positive bacteria drug.

Method for synthesizing aluminum-enriched beta zeolite

The invention discloses a synthesizing method of beta-zeolite, which comprises the following steps: using the solution with aluminium source or acid solution to impregnate silicon source; stirring unit solidifying; aging to dehydrate at 60-150 deg. c without disposed by ammonia; grinding; sintering at 600-1400 deg. c for 1-24h; obtaining the silica-alumina source; blending the ammonium tetraethyl cation compound and hydrofluoric acid; evaporating water under normal pressure not less than 130 deg. c or in the vacuum; adding silica-alumina source into the condensed composite solution of ammonium hydroxide tetraethyl and hydrofluoric acid; proceeding hydrothermal crystallization for the obtained composition; recycling the crystallized product.

Process for preparing catalyst to remove nitrogen oxides and CO from fume

A catalyst for removing nitrogen oxide and CO from fume is prepared through dissolving the water-soluble salts of Mg, Al, transition metal and rare-earth metal in water, preparing the alkali solutionof sodium carbonate and sodium hydroxide, mixing them in a container in ultrasonic field at 10-100 KH2 while stirring, controlling pH value to 7.5-13, filtering, washing, drying and calcine. Its advantages include high activity, higher thermal and hydrothermal stability, and better sulfur oxide poisoning resistance.